Gears+M6=What MPG

Hey everyone I'm going to be doing the M6 swap pretty soon here and I was wondering what gears everyone is running and what MPG do you all average. The main reason for this thread is to see if I would be fine with a M6 and 4:11's

http://web.camaross.com/forums/showthread.php?s=&threadid=213723

See sig. Last trip back to school with 80% interstate cruising at about 75mph.... 26mpg. Went 360 miles on the tank and filled up 13.5 gallons (this right after filling up before leaving home). Pretty decent for a 300+hp 350 V8 :cool:

I'm guessing 1-2 more mpg could've been had if 3.42s rested in the rear.